What Costco expects in the 856
Costco trades on X12 4010 over VAN. Beyond the base standard, watch these:
How EDISQ maps it
The certified Costco 856 map loads when you enable the partner — fields auto-map from NetSuite, QuickBooks, Dynamics, and 33 other systems, validation runs against Costco's spec before transmission, and the sandbox replays Costco test scenarios until everything passes.
Common rejection reasons
Nearly all 856 rejections trace to reference data, not syntax: identifiers that don't match Costco's cross-references, echoed fields dropped from the original PO, or timing that misses the program window. EDISQ flags each before Costco ever sees the document.
Sample Costco 856
A representative 856 interchange addressed to Costco — envelope, shipment→order→pack→item hierarchy, and control totals:
1ISA*00* *00* *ZZ*ACMESUPPLY *ZZ*COSTCO *260101*1200*U*00401*000000001*0*P*>~ 2GS*SH*ACMESUPPLY*COSTCO*20260101*1200*1*X*004010~ 3ST*856*0001~ 4BSN*00*SHIP0001*20260101*1200*0001~ 5HL*1**S~ 6TD1*CTN25*3****G*180*LB~ 7TD5*B*2*UPSN*M~ 8REF*BM*BOL000123~ 9DTM*011*20260105~ 10N1*ST*COSTCO DC 5093*92*5093~ 11HL*2*1*O~ 12PRF*PO12345~ 13HL*3*2*P~ 14MAN*GM*00000123450000000017~ 15HL*4*3*I~ 16LIN**UP*012345678905~ 17SN1**24*EA~ 18CTT*4~ 19SE*17*0001~ 20GE*1*1~ 21IEA*1*000000001~
FAQ
Which 856 version does Costco use?
X12 4010, delivered over VAN. The certified map tracks Costco's current companion guide.
How do I test a Costco 856?
The sandbox generates realistic Costco 856 scenarios against your live mapping — free, unlimited, invisible to Costco.
What does it cost?
Per document only: first 25/month free, then from $0.50, decreasing with volume. No partner or mapping fees.